Change URL in Wordpress - does it mess up SEO ranking?

Hi, I am new to SEO, and I had an assignment to edit a web article in Wordpress. On the dashboard, RankMath SEO recommendations suggested I shorten the URL and add a focus word. I did and the SEO score on the dashboard went up, but when I search for the article using keywords on google it still shows the old article title and redirects to the new URL but the SEO score on the page says 0/100 but when I go the edit dashboard it says 86/100. What could be the issue? Any insight would be appreciated!